Process of drying fish.



E. PASSBURG;

PROCESS OF DRYING FISH.

APPLIOA'LIOH FILED DEC. 24, 1908.

987,394, Patented Mar.21, 1911.

' EM IL PASSBUBG, OF. EBEBLIEN, GERMANY.

rnocnss or DRYING FISH.

Specification of Letters Patent. Application filed December24, 1908. Serial K0. 489,109.

Patented Mar. 21, 1911.

a dryin process which efl'ectually dries thefish wit out producing odor, which latter is paratus in side elevation oflensive and objectionable, as is well known.

Further and other objects will later apar. In the drawings, the figure shows an apartly in section y use of which the inventlon may be practlced. r

The recess is, carried out as follows: The fish or its parts is placed in the steam-boiler a and is there heated by means of steam, in order to sterilize the mass and to soften same. If the substance of the fish is such that it can be reduced to a paste without being steamed, the steaming can of course be omitted. After the steamin the greasy water roduced can be separate y drawn ofi from t e'boiler a through a valve 6 leading to the boiler a into a reducing-mill (Z, after the fish has if necessary, been passed through a reducing device 0. The wet fish reduced by the mill d to a paste falls throughsuitable pipes or the like into a v'essel e from whence the paste is either directly sucked in by the vacuum in the drier 9 through the pipe f or admitted into a piston-press k which forces the wet material into the drier g.

The drier consists of two or more dryingdrums t, which can be heated by steam and rotate in preferably opposite directions.

The drums are arranged'in a chamber h so constructed'tha-t air can be exhausted therefrom. The drums t roll the fish, introduced into the chamber in the form ofa paste, into ee that a. thin layer, and dry it to such de mg reit is no onger sticky, and upon moved from the drums by scrapers i, it read ily enters the worm-channelsm or the heating-pipes of the finishing drier.

, 'vacuo.

whereof I aflix' my signature The worms n feed the material into the second or finishing drier 0 which latter is provided with stirrers of any suitable construction, as p. For instance, as shown in the drawing, the second drying ap aratus ma consist of one or more cylindrica steam jac eted vessel 0, in which stirring devices {I stir the partially dried fishinmaouo, unt 1 same has reached the degree .of dryness required.

The dried'fish is removed from the second drying apparatus by manipulating a suitable valve on one of'the vessels, so that the latter can be em tied and air may have access therein, whi e the other one remainsin vacuo, and receives the substance from the first drier, so that the drying treatment is not interrupted in the primary drying apparatus which can remain in 'vacuo.

I am aware that other food stufis have been pulped and dried in 'vacuo in thin layers on drying cylinders also that two stage "acuum drying by means of apparatus comprising a drum and stirrer is not in itself novel and I lay no claim to such features broadly.

Since the steaming takes place in a closed in can escape.

- at I claim is A process of treating fish which consists in reducing the fish toa aste, subjecting the, paste to a partial drying treatment in vacuo, transforming said aste into a thin layer during said partial ryinfi treatment, subjecting said paste to a finis ing drying treatment invacuo, and subjecting the paste to the action of heat and mechanical agitation during the finishing drying treatment, the fish to be treated remaining always in In testimon in presence 0 two witnesses.

- EMlL PASSBUBG;

HENRY Hasrnn, Womnm Hanr'r;

vessel the vapor arising from. the fish when 3 

